diff --git a/dist/setup/index.js b/dist/setup/index.js
index b84366ca..085872d8 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -71082,8 +71082,8 @@ function writeRegistryToFile(registryUrl, fileLocation, alwaysAuth, username) {
     // Remove http: or https: from front of registry.
     const registryPrefix = registryUrl.replace(/(^\w+:|^)/, '');
     if (username) {
-        newContents += registryPrefix + `:_username=${username}${os.EOL}`;
-        newContents += registryPrefix + `:_email=dummy value` + os.EOL;
+        newContents += registryPrefix + `:username=${username}${os.EOL}`;
+        newContents += registryPrefix + `:email=dummy value` + os.EOL;
     }
     const authString = username
         ? registryPrefix + ':_password=${NODE_AUTH_TOKEN}'
diff --git a/src/authutil.ts b/src/authutil.ts
index ffac7d44..cde3a8af 100644
--- a/src/authutil.ts
+++ b/src/authutil.ts
@@ -52,8 +52,8 @@ function writeRegistryToFile(
   const registryPrefix = registryUrl.replace(/(^\w+:|^)/, '');
 
   if (username) {
-    newContents += registryPrefix + `:_username=${username}${os.EOL}`;
-    newContents += registryPrefix + `:_email=dummy value` + os.EOL;
+    newContents += registryPrefix + `:username=${username}${os.EOL}`;
+    newContents += registryPrefix + `:email=dummy value` + os.EOL;
   }
 
   const authString: string = username